rs786205585

Positions:

• chr7-5529307-G-A
• chr7-5529307-G-C

Variant summary

Our verdict is Pathogenic. Variant got 17 ACMG points: 17P and 0B. PM2 PM5 PP2 PP3_Strong PP5_Very_Strong

The NM_001101.5(ACTB):​c.217C>T​(p.His73Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H73D) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ACTB NM_001101.5 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 9.72

Genes affected

ACTB (HGNC:132): (actin beta) This gene encodes one of six different actin proteins. Actins are highly conserved proteins that are involved in cell motility, structure, integrity, and intercellular signaling. The encoded protein is a major constituent of the contractile apparatus and one of the two nonmuscle cytoskeletal actins that are ubiquitously expressed. Mutations in this gene cause Baraitser-Winter syndrome 1, which is characterized by intellectual disability with a distinctive facial appearance in human patients. Numerous pseudogenes of this gene have been identified throughout the human genome. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Pathogenic. Variant got 17 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr7-5529307-G-C is described in Lovd as [Likely_pathogenic].
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ACTB. . Trascript score misZ 7.6852 (greater than threshold 3.09). GenCC has associacion of gene with ACTB-associated syndromic thrombocytopenia, Baraitser-Winter cerebrofrontofacial syndrome, developmental malformations-deafness-dystonia syndrome, Baraitser-Winter syndrome 1.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.949
• PP5: Variant 7-5529307-G-A is Pathogenic according to our data. Variant chr7-5529307-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 520411.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ACTB	NM_001101.5	c.217C>T	p.His73Tyr	missense_variant	3/6	ENST00000646664.1	NP_001092.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ACTB	ENST00000646664.1	c.217C>T	p.His73Tyr	missense_variant	3/6		NM_001101.5	ENSP00000494750	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Neurodevelopmental delay Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Centre de Biologie Pathologie Génétique, Centre Hospitalier Universitaire de Lille

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Baraitser-Winter syndrome 1 Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Center For Human Genetics And Laboratory Diagnostics, Dr. Klein, Dr. Rost And Colleagues

Dec 11, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.36
CADD	Pathogenic	32
DANN	Benign	0.96
DEOGEN2	Pathogenic	0.90	D;D;D;.;.;D;D;.;D
Eigen	Pathogenic	0.97
Eigen_PC	Pathogenic	0.88
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.83	.;.;T;T;T;T;D;D;D
M_CAP	Pathogenic	0.57	D
MetaRNN	Pathogenic	0.95	D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.0	H;H;H;.;.;.;.;.;.
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.90	D
PROVEAN	Uncertain	-3.5	D;.;.;.;.;D;D;.;D
REVEL	Pathogenic	0.94
Sift4G	Uncertain	0.012	D;.;.;.;.;.;.;.;.
Polyphen		0.87	P;P;P;.;.;.;.;.;.
Vest4		0.86
MutPred		0.81		Loss of catalytic residue at I71 (P = 0.0942);Loss of catalytic residue at I71 (P = 0.0942);Loss of catalytic residue at I71 (P = 0.0942);Loss of catalytic residue at I71 (P = 0.0942);Loss of catalytic residue at I71 (P = 0.0942);Loss of catalytic residue at I71 (P = 0.0942);Loss of catalytic residue at I71 (P = 0.0942);Loss of catalytic residue at I71 (P = 0.0942);Loss of catalytic residue at I71 (P = 0.0942);
MVP		0.94
MPC		3.4
ClinPred		1.0	D
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.3
Varity_R		0.99
gMVP		0.98

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs786205585; hg19: chr7-5568938;